1978 Mercury Grand Marquis Valve Cover and Cylinder Heads

Keep Your 1978 Mercury Grand Marquis in Top Shape with Quality Valve Cover and Cylinder Heads

Whether you’re repairing or upgrading your Valve Cover and Cylinder Head, using high-quality parts is key to keeping your 1978 Mercury Grand Marquis looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Cylinder Head Gaskets, Cylinder Head Bolt Sets, and Push Rods. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.

Top-Rated Valve Cover and Cylinder Heads from Trusted Brands

Looking for a reliable Valve Cover and Cylinder Head? We’ve got you covered with options from brands you know and trust like Sealed Power and FELPRO. For example, Sealed Power Valve Cover and Cylinder Heads start at just $0.43 with an average 4.3 star rating. FELPRO offer similar pricing and quality, backed by strong customer feedback. With over 81 reviews and a solid 4 star average, you can shop with confidence knowing other Mercury Grand Marquis owners approve.

Competitive Prices and Extensive Inventory

The average price for a 1978 Mercury Grand Marquis Valve Cover and Cylinder Head at Advance Auto Parts is around $263.41, with a range that starts at $0.43 and goes up to $1,838.99. With 60 options in stock from 9 trusted brands, finding the right fit is easy. Popular picks like Engine Push Rod, Engine Push Rod, and Severe Duty Engine Cylinder Head Gasket start at just $1.99 and offer a great balance of form and function.

Explore Related Parts

While you’re upgrading or replacing your Valve Cover and Cylinder Head, don’t forget to check out other key components like Engine Gaskets and Seals and Engine Timing Parts. At Advance Auto Parts, we’re here to help you keep your 1978 Mercury Grand Marquis in peak condition, inside and out.

Essential 1978 Mercury Grand Marquis Valve Cover and Cylinder Heads

Edelbrock – Signature Series Valve Covers: Small Block Ford 221-351W 62-95, Chrome Steel (Part No.4460)

Signature Series Valve Covers: Small Block Ford 221-351W 62-95, Chrome Steel

from

$78.99
The Edelbrock #4460 Signature Series Valve Covers are designed for Ford 260-289-302 (not Boss) and 351W V8 applications. Engineered for function and styled for great looks, Signature Series valve covers have stock-style breather baffles that prevent oil passage to the PCV valve. These quality valve covers accept all emissions equipment, including PCV valve holes. Rubber grommets for the breather and PCV valve holes are included. Matching breathers sold separately.

Product Features:
  • Small Block Ford 221-351W 62-95
  • Tall
  • Chrome Steel
  • Set Of Two
  • Rubber Grommets For Breather
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Sealed Power – Engine Valve Lifter (Part No.HT-900)

Engine Valve Lifter

from

$12.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Product Features:
  • Unsurpassed quality that you can trust
  • Uses leading edge materials
  • State-of-the-art manufacturing
  • Exacting tolerances
  • Meets or exceeds OEM specifications
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Sealed Power – Engine Rocker Arm Ball Stud (Part No.MR-1847)

Engine Rocker Arm Ball Stud

from

$1.49
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
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Edelbrock – Sure Seat Valve Springs for Cylinder Heads (Part No.5745)

Sure Seat Valve Springs for Cylinder Heads

from

$190.99
Product Features:
  • Non-Rotator Type
  • 1.550 in. Outer Diameter
  • 0.805 in. Inner Diameter
  • Dual Coil Spring Type
  • Set of 16
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Edelbrock – Pushrod Set for Ford 289-302 (Part No.9658)

Pushrod Set for Ford 289-302

from

$216.99
Edelbrock part #9658 Pushrods are designed for small-block Ford 289-302 V-8 engine applications. These one-piece pushrods are manufactured from high quality 4130 Chromoly steel tubing that has been surface hardened for maximum durability. They have precis

Product Features:
  • 6.43 in. Length
  • 0.312 in. Diameter
  • 4130 Chromoly Steel Material
  • Black Oxide Finish
  • Made In The USA
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Sealed Power – Engine Rocker Arm Nut (Part No.MR-1823)

Engine Rocker Arm Nut

from

$0.72
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Engine Rocker Arm Kit (Part No.R-855)

Engine Rocker Arm Kit

from

$8.49
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Product Features:
  • Complete rocker arm assembly
  • 1 Arm
  • 1 Pivot
  • 1 Arm
  • Utilizes ISO & QS certified manufacturing
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Sealed Power – Engine Rocker Arm (Part No.R-1096)

Engine Rocker Arm

from

$20.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Felpro – PermaTorque Engine Cylinder Head Gasket Set (Part No.HS 9792 PT-6)

PermaTorque Engine Cylinder Head Gasket Set

from

$239.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • PROPRIETARY COATING – Nonstick anti-friction coating seals small surface scratches and imperfections
  • SEALING TECHNOLOGIES – Exclusive sealing innovations and technologies with proprietary materials and unique design features to ensure a superior seal for your repair
  • NO RETORQUE DESIGN – Steel core helps eliminate the need for retorquing head bolts
  • STRONG AND DURABLE – Features graphite or reinforced fiber facing material and steel armor for strength and durability
  • DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
See More

Felpro – PermaTorque Engine Cylinder Head Gasket Set (Part No.HS 9790 PT-16)

PermaTorque Engine Cylinder Head Gasket Set

from

$185.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • PROPRIETARY COATING – Nonstick anti-friction coating seals small surface scratches and imperfections
  • SEALING TECHNOLOGIES – Exclusive sealing innovations and technologies with proprietary materials and unique design features to ensure a superior seal for your repair
  • NO RETORQUE DESIGN – Steel core helps eliminate the need for retorquing head bolts
  • STRONG AND DURABLE – Features graphite or reinforced fiber facing material and steel armor for strength and durability
  • DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
See More

Melling Select Performance – Valve Train Set Up Spring (Part No.VTSS100)

Valve Train Set Up Spring

from

$12.99
Melling Performance valvetrain checking springs feature a low-tension design that allows them to be installed by hand for measuring piston-to-valve clearance, rocker arm ratio, and degreeing in a camshaft.
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Competition Cams – Set of 16 – 10 Degree, 11/32", Single Groove Locks w/ Lash Cap Recess (Part No.611-16)

Set of 16 - 10 Degree, 11/32", Single Groove Locks w/ Lash Cap Recess

from

$479.99
Inside tang-to-taper relationship held tightly for repeatable valve spring installed heights

Product Features:
  • For simplicity, any Super Lock fits any COMP Cams 10° retainer – just choose the correct lock for you valve size and application
  • Super Locks are recommended in all race applications
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Competition Cams – SUPER VALVE LOCKS, 3/8" 1 ST (Part No.612-16)

SUPER VALVE LOCKS, 3/8" 1 ST

from

$479.99
Inside tang-to-taper relationship held tightly for repeatable valve spring installed heights

Product Features:
  • For simplicity, any Super Lock fits any COMP Cams 10° retainer – just choose the correct lock for you valve size and application
  • Super Locks are recommended in all race applications
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Dorman – Steel Cup Expansion Plug 13.70mm, Height 0.180 (Sold by each) (Part No.555-007)

Steel Cup Expansion Plug 13.70mm, Height 0.180 (Sold by each)

from

$1.79
This engine expansion plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:
  • Direct replacement – this engine expansion plug matches the fit and function of the factory part on specified years, makes and models
  • Ideal solution – this plug is a reliable replacement for an original part that is missing or has failed due to fatigue
  • Durable construction – this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
See More

Sealed Power – Engine Exhaust Valve (Part No.V-4603)

Engine Exhaust Valve

from

$16.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Engine Intake Valve (Part No.V-3956)

Engine Intake Valve

from

$10.49
Sealed Power parts provide innovative designs, use leading-edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Product Features:
  • Chrome plated stem
  • Hard coating added to surface for strength & aiding in lubrication
  • Note – coating added in varying thicknesses depending on application
  • Innovative design, using leading edge materials
  • Utilizes ISO & QS certified manufacturing
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Edelbrock – Small-Block Ford E-Street Cylinder Heads 2.02" (Part No.5025)

Small-Block Ford E-Street Cylinder Heads 2.02"

from

$1332.99
The Edelbrock #5025 E-Street cylinder heads are designed for Ford 289-351 W V8 applications. The Edelbrock E-Street cylinder heads offer American made quality and affordable performance. E-Street cylinder heads feature as-cast ports and are designed for e

Product Features:
  • Complete Pair
  • 60cc Combustion Chamber Volume
  • 170cc Intake/60cc Exhaust Runner Volume
  • 2.02 in. Intake/1.6 in. Exhaust Valve Diameter
  • 0.625 in. Deck Thickness
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Edelbrock – Small-Block Ford E-Street Cylinder Heads 1.90" (Part No.5023)

Small-Block Ford E-Street Cylinder Heads 1.90"

from

$1479.99
The Edelbrock #5023 E-Street cylinder heads are designed for Ford 289-351 W V8 applications. The Edelbrock E-Street cylinder heads offer American made quality and affordable performance. E-Street cylinder heads feature as-cast ports and are designed for e

Product Features:
  • Complete Pair
  • 60cc Combustion Chamber Volume
  • 170cc Intake/60cc Exhaust Runner Volume
  • 1.9 in. Intake/1.6 in. Exhaust Valve Diameter
  • 0.625 in. Deck Thickness
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Spartan – Engine Cylinder Head; Ford 4.6 95-00 LFT Head (Part No.2FT7)

Engine Cylinder Head; Ford 4.6 95-00 LFT Head

from

$554.99
Remanufactured Cylinder Heads are complete rebuild & include new valve stem seals, soft plugs & verified camshafts. All threads are checked and repaired if necessary. Cylinder Heads are packaged in heavy plastic to protect the unit.

Product Features:
  • All cylinder heads are both vacuum and pressure tested to verify valve seating, & integrity of water passages.
  • All cylinder heads are packaged in environmentally safe and recyclable containers that are the perfect size for returning your original core
  • All threads and machined surfaces are and repaired with technology that exceeds the original metal
  • Non-sealing iron surfaces painted to prevent oxidization
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ARP Auto Racing – For Use With Ford Big Block 429/ 460 Cid, Hex Head, Black Oxide, Chrome Moly (Part No.155-3603)

For Use With Ford Big Block 429/ 460 Cid, Hex Head, Black Oxide, Chrome Moly

from

$245.99
High Performance head bolts are available with a reduced wrenching hex or 12 point and wide area flanged head that eliminates the need for valve train removal to facilitate cylinder head retorquing. All High Performance Series bolts are 180,000 PSI (which is 15 Percent stronger than Grade 8) and kits come complete with hardened parallel ground washers.

Product Features:
  • High Performance Head Bolts Are Available With A Reduced Wrenching Hex Or 12 Point
  • Wide Area Flanged Head That Eliminates The Need For Valve Train Removal To Facilitate Cylinder Head Retorquing
  • Rated At 180,000 PSI Tensile Strength
  • High Performance Head Bolts Are Stronger
See More

Felpro – Engine Cylinder Head Bolt Set (Part No.ES 71328)

Engine Cylinder Head Bolt Set

from

$57.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Avoid risk associated with re-use of T-T-Y (torque to yield) head bolts
  • Validated for fit, form and function
  • Unsurpassed quality you can trust
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Edelbrock – Ford 429-460 Head Bolt Kit (Part No.8566)

Ford 429-460 Head Bolt Kit

from

$355.99
The Edelbrock #8566 bolt kit contain a complete set of the highest quality head bolts and hardened washers available. Cold-formed to ensure molecular integrity and heat treated prior to thread rolling and machining. Reduced diameter bolt heads eliminate t
See More

Felpro – PermaTorque Engine Cylinder Head Gasket (Part No.26483 PT)

PermaTorque Engine Cylinder Head Gasket

from

$88.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • PROPRIETARY COATING – Exclusive coating helps withstand rougher sealing surface finishes up to 80 Ra
  • SUPERIOR SEAL – Precise embossed sealing beads at all vital areas to eliminate leak paths
  • MULTI-LAYERED STEEL CONSTRUCTION – Multiple layers of stainless steel maintain sealing stress and accommodate head lift
  • UNIQUE COMBUSTION SEAL – Accommodates high cylinder pressures and head movement encountered with engines
  • DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
See More

Felpro – PermaTorque Engine Cylinder Head Gasket (Part No.9792 PT-2)

PermaTorque Engine Cylinder Head Gasket

from

$59.99
Product Features:
  • PROPRIETARY COATING – Exclusive coating helps withstand rougher sealing surface finishes up to 80 Ra
  • SUPERIOR SEAL – Precise embossed sealing beads at all vital areas to eliminate leak paths
  • MULTI-LAYERED STEEL CONSTRUCTION – Multiple layers of stainless steel maintain sealing stress and accommodate head lift
  • UNIQUE COMBUSTION SEAL – Accommodates high cylinder pressures and head movement encountered with engines
  • DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
See More

Edelbrock – Cylinder Head Gasket Set for Ford (Part No.7313)

Cylinder Head Gasket Set for Ford

from

$65.99
Product Features:
  • Cylinder Head Gasket
  • 1963-1996 289-302 (except boss)-351w; 1982-1996 5L
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Dorman – Pipe Plug C.S. Square 3/8-18 Npt, Head Size 5/16 In. (Sold by each) (Part No.090-019)

Pipe Plug C.S. Square 3/8-18 Npt, Head Size 5/16 In. (Sold by each)

from

$3.29
This engine cylinder head plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:
  • Direct replacement – this engine cylinder head plug matches the fit and function of the factory part on specified years, makes and models
  • Ideal solution – this plug is a reliable replacement for an original part that is missing or has failed due to fatigue
  • Durable construction – this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
See More

Dorman – Pipe Plug C.S. Hex 3/4-14 Npt X 5/8 In. (sold by each) (Part No.090-072)

Pipe Plug C.S. Hex 3/4-14 Npt X 5/8 In. (sold by each)

from

$3.99
This engine cylinder head plug is designed to match the fit and function of the original part on specified vehicles. Made of quality materials, it is engineered for reliable performance.

Product Features:
  • Direct replacement – this engine cylinder head plug matches the fit and function of the factory part on specified years, makes and models
  • Ideal solution – this plug is a reliable replacement for an original part that is missing or has failed due to fatigue
  • Durable construction – this part is made from quality materials to ensure reliable performance and long service life
  • Trustworthy quality – backed by team of product experts in the United States and more than a century of automotive experience
See More

Most Popular Cylinder Head Gaskets for 1978 Mercury Grand Marquis

Enhance your 1978 Mercury Grand Marquis with one of the 4 Cylinder Head Gaskets we have in stock, starting at just $35.99.

Felpro – PermaTorque Engine Cylinder Head Gasket (Part No.8548 PT-2)

PermaTorque Engine Cylinder Head Gasket

from

$35.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • PermaTorque head gaskets meets or exceeds all original equipment specifications
  • Application specific design to ensure a perfect fit
  • Requires no retorquing of the head bolts
  • Manufactured for the repair environment
  • Validated for fit, form, and function
  • Unsurpassed quality you can trust
See More

Felpro – PermaTorque Engine Cylinder Head Gasket (Part No.9333 PT-1)

PermaTorque Engine Cylinder Head Gasket

from

$35.99
Fel-Pro gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust.

Product Features:
  • Manufactured for the repair environment
  • Unsurpassed quality you can trust
  • Unsurpassed quality you can trust
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Felpro – Severe Duty Engine Cylinder Head Gasket (Part No.520 SD)

Severe Duty Engine Cylinder Head Gasket

from

$42.99
Product Features:
  • DESIGNED FOR THE TOUGHEST CONDITIONS – Engineered for hardworking vehicles that operate in severe conditions
  • STRONG AND DURABLE – Severe duty steel core gaskets designed slightly thicker to accommodate for machined surfaces
  • PREMIUM MATERIALS – High-grade stainless armor enhances strength and corrosion resistance while proprietary coatings enhance sealing and anti-stick properties
  • SUPERIOR SEAL – Precise embossed Printo seal sealing beads at all vital areas to eliminate leak paths
  • DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
See More

Mr. Gasket – Mls Head Gasket (Part No.3175G)

Mls Head Gasket

from

$126.99
Our unique Multi-Layered steel head gasket embossment formation process optimizes the embossment radius, reduces stress points, enhances gasket conformability, and provides uniform clamp load distribution. This all results in superior surface contact between block and cylinder head. All head gasket layers/spacers go through an additional process to significantly reduce forming induced stress. Advantages are reduced brittleness in material, increased flexibility and deformation retention. This stabilizes the gasket, resulting in reduced cylinder bore distortion and improved combustion seal fro the extreme cylinder pressures found in high compression, supercharged and turbocharged applications. A proprietary polymer coating ensures the micro-seal of engine coolant and oil fluids.brbrA typical MLS head gasket requires a smoother (30Ra) surface finish than composite head gaskets. Mr. Gasket’s proprietary polymer coating will seal a surface finish twice as rough (60Ra) as a typical MLS head gasket. For high performance street, drag race and oval track use.

Product Features:
  • Gasket bore – 4.030 inch: Compressed thickness – .040 inch
  • Manufactured from 3-layer premium grade stainless steel and state of the art laser cutting
  • Optimized sealing embossments seals extreme cylinder pressure
  • Provides excellent stability and reduces cylinder bore distortion.
  • Proprietary polymer coating ensures the micro seal of engine coolant and oil fluids.
  • Ideal for supercharged, turbocharged, nitrous oxide and extreme compression ratio engines
  • For high-performance street, drag race and oval track use
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Best-Selling 1978 Mercury Grand Marquis Cylinder Head Bolt Sets

Upgrade your Grand Marquis with one of our 3 best-selling Cylinder Head Bolt Sets.

ARP Auto Racing – For Use With Ford 351 Windsor, Hex Head, 180000Psi Tensile (Part No.154-3603)

For Use With Ford 351 Windsor, Hex Head, 180000Psi Tensile

from

$137.99
High Performance head bolts are available with a reduced wrenching hex or 12 point and wide area flanged head that eliminates the need for valve train removal to facilitate cylinder head retorquing. All High Performance Series bolts are 180,000 PSI (which is 15 Percent stronger than Grade 8) and kits come complete with hardened parallel ground washers.

Product Features:
  • High Performance Head Bolts Are Available With A Reduced Wrenching Hex Or 12 Point
  • Wide Area Flanged Head That Eliminates The Need For Valve Train Removal To Facilitate Cylinder Head Retorquing
  • Rated At 180,000 PSI Tensile Strength
  • High Performance Head Bolts Are Stronger
See More

ARP Auto Racing – For Use With Ford Big Block 429/ 460 Cid, Hex Head, Black Oxide, Chrome Moly (Part No.155-3603)

For Use With Ford Big Block 429/ 460 Cid, Hex Head, Black Oxide, Chrome Moly

from

$245.99
High Performance head bolts are available with a reduced wrenching hex or 12 point and wide area flanged head that eliminates the need for valve train removal to facilitate cylinder head retorquing. All High Performance Series bolts are 180,000 PSI (which is 15 Percent stronger than Grade 8) and kits come complete with hardened parallel ground washers.

Product Features:
  • High Performance Head Bolts Are Available With A Reduced Wrenching Hex Or 12 Point
  • Wide Area Flanged Head That Eliminates The Need For Valve Train Removal To Facilitate Cylinder Head Retorquing
  • Rated At 180,000 PSI Tensile Strength
  • High Performance Head Bolts Are Stronger
See More

Edelbrock – Ford 429-460 Head Bolt Kit (Part No.8566)

Ford 429-460 Head Bolt Kit

from

$355.99
The Edelbrock #8566 bolt kit contain a complete set of the highest quality head bolts and hardened washers available. Cold-formed to ensure molecular integrity and heat treated prior to thread rolling and machining. Reduced diameter bolt heads eliminate t
See More

Top-Quality Push Rods for 1978 Mercury Grand Marquis

Choose a high-quality OEM or aftermarket Push Rod for Mercury Grand Marquis and enjoy top-notch performance from $1.99.

Sealed Power – Engine Push Rod (Part No.RP-3160)

Engine Push Rod

from

$2.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Engine Push Rod (Part No.RP-3209)

Engine Push Rod

from

$2.49
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Product Features:
  • State-of-the-art manufacturing
  • Exceptional material quality
  • Exacting tolerances
  • Heat treated tips
  • Stock or mild modified replacement
  • Made in USA
See More

Sealed Power – Engine Push Rod (Part No.RP-3186)

Engine Push Rod

from

$1.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Sealed Power – Engine Push Rod (Part No.RP-3252)

Engine Push Rod

from

$2.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.
See More

Top Picks for 1978 Mercury Grand Marquis Cylinder Head Gasket Sets

Invest in one of our 2 durable Cylinder Head Gasket Sets for your 1978 Mercury, knowing you’re getting trusted brands and expert craftsmanship.

Felpro – PermaTorque Engine Cylinder Head Gasket Set (Part No.HS 8347 PT)

PermaTorque Engine Cylinder Head Gasket Set

from

$67.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • Head sets contain gaskets and seals necessary for a valve grind or head reconditioning job
  • Application specific design to ensure a perfect fit and premium seal
  • Premium quality parts you can trust
  • Engineered and manufactured specifically for the repair environment
  • Unsurpassed quality you can trust
  • Contains all the parts needed to complete the repair unless otherwise noted
See More

Felpro – PermaTorque Engine Cylinder Head Gasket Set (Part No.HS 8265 PT-1)

PermaTorque Engine Cylinder Head Gasket Set

from

$90.99
Fel-Pro gaskets are specifically designed for the repair environment to deliver a reliable seal on even the most troublesome applications. Designed for imperfect sealing surfaces and manufactured with proprietary materials, you can count on Fel-Pro for innovative sealing solutions for the real-world repair environment.

Product Features:
  • PROPRIETARY COATING – Nonstick anti-friction coating seals small surface scratches and imperfections
  • SEALING TECHNOLOGIES – Exclusive sealing innovations and technologies with proprietary materials and unique design features to ensure a superior seal for your repair
  • NO RETORQUE DESIGN – Steel core helps eliminate the need for retorquing head bolts
  • STRONG AND DURABLE – Features graphite or reinforced fiber facing material and steel armor for strength and durability
  • DESIGNED FOR IMPERFECT SEALING SURFACES – Engineered and manufactured specifically for the repair environment to help seal imperfect sealing surfaces
See More

Top-Rated Engine Valve Lifters for 1978 Mercury Grand Marquis

Make a smart move for your 1978 Mercury Grand Marquis with products all priced from $12.99 to $211.99.

Sealed Power – Engine Valve Lifter (Part No.HT-900)

Engine Valve Lifter

from

$12.99
Sealed Power« parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Product Features:
  • Unsurpassed quality that you can trust
  • Uses leading edge materials
  • State-of-the-art manufacturing
  • Exacting tolerances
  • Meets or exceeds OEM specifications
See More

Edelbrock – Performer RPM Hydraulic Flat Tappet Lifters (Part No.9705)

Performer RPM Hydraulic Flat Tappet Lifters

from

$211.99
Product Features:
  • Hydraulic Flat Tappet Lifter
  • Steel Material
  • 0.874 in. Outside Diameter
  • Set of 16
  • Performer RPM Series
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Sealed Power – Engine Valve Lifter (Part No.HT-900B)

Engine Valve Lifter

from

$29.99
Sealed Power® parts provide innovative designs, use leading edge materials and utilize ISO & QS certified manufacturing in order to deliver top quality products that meet the rigorous demands of today’s modern engines.

Product Features:
  • Unsurpassed quality that you can trust
  • Uses leading edge materials
  • State-of-the-art manufacturing
  • Exacting tolerances
  • Meets or exceeds OEM specifications
See More

Top-Rated Valve Cover and Cylinder Head Brands For Your 1978 Mercury Grand Marquis

When it comes to finding the perfect Valve Cover and Cylinder Head for your 1978 Mercury Grand Marquis, Advance Auto Parts has you covered with a wide selection of high-quality OEM and aftermarket options from 9 trusted brands. We carry the most popular Valve Cover and Cylinder Head brands including FELPRO and Sealed Power, and more, all known for their exceptional customer ratings (average brand rating of 4.6 stars) and competitive prices, as low as $0.43. Purchasing a Valve Cover and Cylinder Head from us here at Advance Auto Parts is a smart move for both you and your 1978 Mercury Grand Marquis, providing peace of mind with parts that meet or exceed OEM standards.

Popular FELPRO 1978 Mercury Grand Marquis Valve Cover and Cylinder Heads

If you’re looking for a top-quality Valve Cover and Cylinder Head for your 1978 Mercury Grand Marquis, Advance Auto Parts has exactly what you need with our selection of FELPRO Valve Cover and Cylinder Heads. We have 2 FELPRO Valve Cover and Cylinder Heads in stock for this fitment, all known for their durability and precision fit. With prices starting at just $35.99, you’ll find the perfect Valve Cover and Cylinder Head for your needs and budget. FELPRO Valve Cover and Cylinder Heads for the 1978 Mercury Grand Marquis come highly rated, with over 6 customer reviews and an impressive average rating of 4.6 stars. Choosing a FELPRO Valve Cover and Cylinder Head from Advance Auto Parts is a smart move to ensure quality and value for your vehicle.
PermaTorque Engine Cylinder Head Gasket
from $35.99
(4)
PermaTorque Engine Cylinder Head Gasket
“Part was perfect fit.”
PermaTorque Engine Cylinder Head Gasket
from $35.99
(2)
PermaTorque Engine Cylinder Head Gasket
“Perfect fit and quality for my stock 289. Highly recommended when using the original cast iron heads.”

Top-Quality Sealed Power 1978 Mercury Grand Marquis Valve Cover and Cylinder Heads

For those in search of a high-quality Valve Cover and Cylinder Head for their 1978 Mercury Grand Marquis, Advance Auto Parts offers a great selection of Sealed Power Valve Cover and Cylinder Heads. With 3 Sealed Power Valve Cover and Cylinder Heads in stock, you can trust you’re getting top-tier parts designed for durability and a perfect fit. Prices for these Valve Cover and Cylinder Heads start at just $0.43, with an average price of $5.47, giving you a range of options to suit your budget. Backed by over 14 customer ratings and an average rating of 4.3 stars, Sealed Power Valve Cover and Cylinder Heads provide both reliability and excellent performance. Choosing a Sealed Power Valve Cover and Cylinder Head from Advance Auto Parts is a smart investment in your vehicle’s performance and longevity.
Engine Valve Lifter
from $12.99
(11)
Engine Valve Lifter
“Work like a champ”
Engine Valve Spring Retainer Keeper
from $0.43
(2)
Engine Valve Spring Retainer Keeper
“You guys are always great”
Engine Push Rod
from $2.99
(1)
Engine Push Rod
“great quality as usual from sealed power.”

FAQs for 1978 Mercury Grand Marquis Valve Cover and Cylinder Heads

What are the best-selling Valve Cover and Cylinder Heads for 1978 Mercury Grand Marquis?

Out of 60 Valve Cover and Cylinder Heads that fit 1978 Mercury Grand Marquis, the following parts are the top sellers:

What’s the price range for 1978 Mercury Grand Marquis Valve Cover and Cylinder Heads?

The prices of Valve Cover and Cylinder Heads for the 1978 Mercury Grand Marquis range from $0.43 up to $1,838.99 for the most premium parts.

What is the average price of a Valve Cover and Cylinder Head for a 1978 Mercury Grand Marquis?

The average price for Valve Cover and Cylinder Heads for the 1978 Mercury Grand Marquis is $263.41. Keep in mind the variety of part types within our Valve Cover and Cylinder Head category, where you are likely to find a wide range of prices across a variety of parts and components.

Does Advance Auto Parts sell Valve Cover and Cylinder Heads for other Mercury Grand Marquis model years?

Yes, we carry Valve Cover and Cylinder Heads for 35 model years of Mercury Grand Marquis between 1975 and 2011. The following model years are the most popular for Valve Cover and Cylinder Head purchases: 2011, 2010, 2009, 2008, 2007, 2006, 2005, 2004, and 2003.

What are the cheapest Valve Cover and Cylinder Heads for my 1978 Mercury Grand Marquis?

The cheapest 1978 Mercury Grand Marquis Valve Cover and Cylinder Heads we carry are:

Does Advance Auto Parts sell Valve Cover and Cylinder Heads for any other 1978 Mercury models?

What are the top-rated Valve Cover and Cylinder Heads that fit the 1978 Mercury Grand Marquis?

The one 1978 Mercury Grand Marquis Valve Cover and Cylinder Head we have in stock is the Engine Valve Spring Retainer Keeper. It is rated 5 stars and costs $0.43.

What types of Valve Cover and Cylinder Heads do you sell for my 1978 Mercury Grand Marquis?

As of 11/2/25, these are some of the most in-demand types of Valve Cover and Cylinder Heads for a 1978 Mercury Grand Marquis:

Can I get help with 1978 Mercury Grand Marquis Valve Cover and Cylinder Head orders?

Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Mercury Valve Cover and Cylinder Heads and more.

What is your return policy for Mercury Grand Marquis Valve Cover and Cylinder Heads?

Advance Auto Parts keeps returns simple. For new Mercury Grand Marquis Valve Cover and Cylinder Heads and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.